Principles of Islamic jurisprudence otherwise known as Uṣūl al-fiqh (أصول الفقه‎‎) is the study and critical analysis of the origins, sources, and principles upon which Islamic jurisprudence is based. Traditionally four main sources (Qur’an, Sunnah, consensus (Ijma), analogical reason (Qiyas)) are analysed along with a number of secondary sources and principles.